Unit 2 Test

What is the wavelength of visible light in nanometers?

What is the popular experiment that demonstrates the dual nature of light?

Which of the following occurs as a light wave bends when it passes from one medium into another?

• reflection

• refraction

• emmisson

Light in the form of a particle that has discrete amount of energy is called a...

Shorter Waves have ____Energy, Longer Waves___Energy?

• Lower,Higher

• Higher,Lower

From lowest energy to highest energy, what is the order of the electromagnetic spectrum?

How many waves are in this picture?

• 1
• 2
• 3.5
• 4

Which scientist explained the photoelectric effect and proved that light can also behave as a particle?

• James Clerk Maxwell

• Isaac Newton

• Thomas Young

• Albert Einstein

The only way to increase the number of photoelectrons emitted is by increasing the _________ of the light

• Intensity

• Wavelength

• Frequency

• Energy

This image is an illustration of

• photoelectric effect
• Dalton's atomic theory
• Bohr model
• Quantum mechanical model